As a professional factory and supplier in China, Wzonpa provides the GN30-12 Medium-voltage Indoor Disconnector Switch, a high-performance solution for AC 50Hz power distribution systems with rated voltage of 12kV and rated current up to 630A.
Designed for safe circuit disconnection under no-load conditions, this disconnector switch ensures visible isolation, protecting equipment and personnel during maintenance. The compact structure, minimal space requirement, and reliable insulation make it ideal for integration into indoor switchgear or standalone electrical installations.
Compact and Efficient Design: Two sets of fixed insulators and contacts are mounted on a sturdy three-phase frame, allowing smooth operation while minimizing space occupation.
Reliable Isolation: The rotary knife contact provides visible air gaps to ensure safe disconnection, reducing risks during transformer or cable maintenance.
Flexible Operation: Medium-voltage Indoor Disconnector Switch can be operated manually or through motor-driven mechanisms, with interlocking features to prevent incorrect operation.
Durable Insulation: Designed to withstand rated short-time currents up to 20kA~40kA and lightning impulse voltage up to 85kV, ensuring long-term stability.
Versatile Applications: Suitable for indoor power distribution, switchgear integration, and enclosed substation environments.
Installation altitude up to 1000 meters.
Ambient temperature: -10°C to +40°C.
Relative humidity: daily average ≤ 95%, monthly ≤ 90%.
Free from heavy dust, corrosive, or explosive substances.
Seismic intensity ≤ 8 degrees with minimal vibration.
The GN30-12 Medium-voltage Indoor Disconnector Switch operates via a rotating contact knife, creating or eliminating a visible air gap between fixed contacts. This ensures circuit isolation when the circuit is unloaded, enhancing operational safety. The interlocking mechanism prevents misoperation, while optional earthing switches provide grounding capability to discharge residual energy.
Wzonpa’s Medium-voltage Indoor Disconnector Switch is suitable for industrial facilities, factories, and indoor substations requiring reliable power isolation. Its standard type (GN30-12) and extended type with earthing switch (GN30-12D) allow flexibility in circuit configuration and maintenance tasks, making it a dependable choice for electrical engineers and maintenance teams.
Experienced Manufacturer: Over 20 years producing medium-voltage switchgear in a 150,000㎡ Yueqing, China facility.
Proven Reliability: Supplies State Grid and large industrial clients with stable, tested products.
Safe and Practical Design: Compact, easy-to-install Medium-voltage Indoor Disconnector Switch for indoor switchgear.
Strict Quality Control: Components and assembly are rigorously inspected for long-term performance.
Customer Support: Offers installation guidance, technical consultation, and customization options.
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Product Specifications
Parameter Item |
GN30-12/ 400-12.5 |
GN30-12/ 630-12.5 |
GN30-12/ 1000-12.5 |
GN30-12/ 1250-12 5 |
GN30-12/ 1600-12.5 |
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GN30-12D/ 400-12.5 |
GN30-12D/ 630-12.5 |
GN30-12D/ 1000-12.5 |
GN30-120/ 1250-12.5 |
GN30-12D/ 1600-12.5 |
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| Voltage, current parameters | ||||||
| Rated voltage (kV) | 12 | |||||
| Rated current (A) | 400 | 630 | 1000 | 1250 | 1600~3150 | |
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Rated short-time withstand current (kA) |
12.5 | 20 | 31.5 | 31.5 | 40 | |
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Rated short-time duration (S) |
4 | 4 | 4 | 4 | 4 | |
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Rated peak withstand current (KA) |
31.5 | 50 | 80 | 80 | 100 | |
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Rated insulation level |
1 min power frequency withstand voltage (KV) |
Between pole, pole to earth 42 fracture 48 | ||||
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Lightning impulse voltage (kV) |
Between pole, pole to earth 75 fracture 85 | |||||
Address
No. 58 Binhainan Fourth Road, Economic Development Zone, Yueqing City, Wenzhou City, Zhejiang Province, China
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